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    <title>Document</title>
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    <script>
        //1.创建类class 创建一个明星类
        class Star{
            constructor(uname,age){
                this.uname=uname;
                this.age=age
            }
            sing(song){
               console.log(this.uname+":"+song);
            }

        }
        
        //2.利用类创建对象 new
        var ldh = new Star("刘德华",18);
        var zxy = new Star("张学友",20);
        ldh.sing("冰雨");
        zxy.sing("李香南");
    </script>
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